Machine for the manufacture of pressed-glass articles.



No. 686,285. 4 Patented Nov. I2, 19m.

a. H. GRAY.

MACHINE FOR THE MANUFACTURE OF PBESSED GLASS ARTICLES.

(Application filed May 12, 1900.)

(No Model.) 5 Sheets-Sheet I.

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No. 686,285. Patented Nov. I2, I90].

. G. H. GRAY.

MACHINE FOR THE MANUFACTURE OF PBESSED GLASS ARTICLES.

(Application filed May 12. 1900.) (No Model.) 5 Sheets-Sheet 2.

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No. 686,285. Patented Nov. I2, 190i. G. H. GRAY.

MACHINE FOR THE MANUFACTURE OF PRESSED GLASS ARTICLES.

(Application filed May 12, 1900.)

(No Model.) 5 Shets8heet 3.

A niiiiirimiiiimum u -w WITNESSES: INVENTOR.

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No. 686,285. Patented Nov. l2, 190i.

G. H. GRAY.

MACHINE FOR THE MANUFACTURE OF PRESSED GLASS ARTICLES.

(Application filed May 12, 1900.)

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(No Mndel.)

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RRIS Pznzns o0. PHOTOLITHO.,WASH1NGTON n c Patented Nov. l2, l90l. G. H.GRAY.

MACHINE FOR THE MANUFACTURE OF PRESSED GLASS ARTICLES.

(Application fild May 12. 1900.)

5 Sheets-Sheet 5.

(No Model.)

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GRANVILLE H. GRAY, OF MARION, INDIANA, ASSIGNOR TO GOLDEN GATE FRUIT JARCOMPANY, A ooRPoRATIoN OF CALIFORNIA.

MACHINE FOR THE MANUFACTURE OF PRESSED-GLA SS ARTICLES.

SPECIFICATION toms-ing part of Letters Patent No. 686,285, datedNovember 12, 1901.

Application filed May 12, 1900. Serial No. 16,495. (No model.)

To all whom, it may concern:

Be it known that I, GRANVILLE H. GRAY, a citizen of the United States,residing at Marion, in the county of Grant and State ofIndiana,haveinvented certain new and usefullmprovements in Machines forthe Manufacture of Pressed-Glass Articles, of which the following is aspecification.

Myinvention relates to the manufacture of pressed-glass articles, andmore especially to that class of pressed-glass articles in which thereis a screw-thread upon a part of the article pressed; and to this end myinvention consists of molds whereby the articles may be pressed and fromwhich they can be automatically extracted, as fully set forthhereinafter and as illustrated in the accompanying drawings, in whichFigure 1 is an elevation of a machine for the manufacture ofpressed-glass articles em.- bodying my improvements. Fig 2 is anelevation showing the opposite side of the machine. Fig. 3 is anenlarged sectional plan on the line 3 3 of Fig. 1. Fig. 4 is an enlargedsection of the clutch device; Fig. 5, a section on the line 5 5, Fig. 4;Fig. 6, a detail in front elevation of the upper part of themachine,showing the equalizing-lever applied to the plunger; Fig. 7, asection through one of the molds and part of the table; Fig. 8, anelevation showing the means for discharging the articles after they havebeen molded, and Fig. 9 a plan of Fig. 8.

The frame Aof the machine has, as shown, a standard I) erected upon abase a and having at the top a head d, and from one side projects abracket 0, above which is another bracket 6.

The driving-shaft I is horizontal, turning chine.

tion is imparted by means of a sliding pawl 62, carried by an arm 8,swinging about the shaft and connected by a connecting-rod 10 with acrank 9 at the lower end of the shaft 2, the pawl engaging a ratchet 12upon the shaft 6.

In the bracket 6 slides vertically a plungershaft 13, to the upper endof which is connected an arm 14, attached to a strap 15,which encirclesaneccentric 16 upon the forward end of the shaft I, and at the lower endof the shaft 13 is a plungerf of any suitable shape.

Uponthe table B are a series of molds N at uniform distance apart, whichby the action of the pawl and ratchet aforesaid are successively broughtbeneath the plunger and arrested in this position, the plunger thendescending into the mold beneath it and forcing the molten glass thathas been deposited therein into the interstices of the mold, after whichthe plunger ascends and the table rotates to bring another mold beneaththe plunger. Each mold N is intended to mold an article having anexternal screw-thread. As shown, it is intended for a preserve-jar caphaving an external screw, substantially as in my Letters Patent No.634,107, dated 00- tober 3, 1899, and after the molding of the same itbecomes necessary to remove it from the mold by a rotary movement. Tosecure this result, I make use of a mold consisting of three partsthatis, a base 18, which forms the surface of the top of the cap and whichis secured to the face of the table B, a ring 19, which forms thethreaded exterior of the cap, and a ring 20, which forms the peripheryof the cap, which portion is ribbed vertically or is polygonal. The ring20 is connected with a yoke 0 having two vertical rods 21 21, passingthrough the table, and a cross-piece 22, so that on lowering the yokesthe rings 20 may be carried down onto the table, bringing the parts intocooperating position with the base 18, when the mold is to be filledwith glass and the latter is to be pressed, while by raising the yokesthe rings may be lifted away from the base 18 preliminary to rotatingthe ring 19. Vhen the ring 19 is rotated, the molded article isprevented from rotating in consequence of the angular or ribbedperiphery within the ring 20, as

shown in dotted line 98 in Fig. 9, and asa result the article is forceddownward out of the ring 20 and onto the table or to an automaticdelivery device.

Any suitable means may be employed for rotating the threaded section ofthe mold. As shown, the section 19 has ratchet-teeth i on its uppersurface, forming a ratchet-ring adapted to engage with teeth of aratchet h on the end of a shaft j, driven by gears, as shown, orotherwise from the shaft 2, the shaft j and its ratchet h being sosupported above the table B that when a yoke (J is elevated after themold connected therewith has passed from the plunger the ring 19 isbrought into engagement with the ratchet h, which is preferablymaintained in continuous rotation, when the ring 19 will be rotated todischarge the molded cap, after which the yoke descends, bringing theparts into position after the rotation of the table to receive a newsupply of molten glass prior to again being brought below the plunger.

Any suitable devices may be employed for lifting the movable sections ofthe molds successively after they have passed from beneath the plunger.As shown, there isa lever 23, arranged beneath the table B and having anend with an inclined face 72, onto which a roller n on each cross-bar 22rides as the table is rotated and whereby the mold-sections are lifteduntil the ratchet-teeth of the ring 19 are directly below and nearly incontact with those of the ratchet h. As the ring 19 is now concentricwith the ratchet h, the mold-section is then positively further liftedby the rocking of the lever 23, the outer end of which is quicklydepressed by the action of a grooved cam 25 on the lower end of theshaft 2. The lever 23 is brought by this rocking movement on a levelwith the stationary and curved track 26. As the table Bis revolved,carrying the molds around wit-h it, the roller n passes upon the curvedtrack 26, whereby the elevated mold-section is kept in raised positionuntil the roller reaches the end of the track. The track 26 willterminate on the opposite side of the the table, and its purpose is tohold the upper mold-sections out of contact with the base 18 and thetable to prevent heating the latter parts as much as possible. The ringand ratchet remain in contact until the ring has turned a sufficientnumber of revolutions to discharge the molded cap, when the lever 23will be vibrated to permit the descent of the mold-section upon thetrack 26. These operations take place while the plunger is descendingand rising in molding the cap in one of the other molds. It will ofcourse be understood that if the thread is upon the interior of thearticle the molding parts will be properly changed to adapt them to thenew conditions; but the other features may be retained.

In order to prevent the straining or breaking of the parts should toogreat a proportion of glass be deposited in a mold, I provide for ayielding connection between the plunger and the eccentric. Thisplunger-shaft may slide to a limited extent in a sleeve 28, pivoted tothe rod 14 and with an elongated slot m to receive a cross-pin 29,extending from the plunger-shaft, and a spring 30, coiled around theshaft, bears on the end of the sleeve 28 and on the shoulderp of theshaft and tends to maintain the pin 29 at the bottom of the slot m; butif there is any obstruction to the downward movement of the plunger theshaft 13 can slide vertically in the sleeve 28 to a sufficient extent toprevent injury. The shaft 13 has a threaded projection 31 or isotherwise constructed for the attachment of plungersfofany desiredshape.

As the ring 19 lies loosely in the ring 20, it might be forced upward bythe pressure of the molded material when the plunger descends. Toprevent this, I provide means for maintaining pressure upon the ring 19during the downward movement of the plunger. Different pressing devicesand means for bringing them to bear upon the ring 19 at the proper timemay be employed. Preferably such pressing device should be carried bythe plunger, and I show a pressure device D, (see Fig. 1,) consisting ofa yoke composed of a split ring 33, a disk 34 below the same, a seriesof rods 35, extending through both ring and disk and sliding in one orboth of the same, and a spring upon each rod. The disk 34 has a slidingfit on the plunger-shaft, while the split ring 33 is stationary. Thedisk is forced down against the ring 19 by the springs 35, but allowingthe plunger-shaft to descend through said ring. The ring 33 isinternally threaded and adapted to a threaded portion 36 of theplunger-rod 13, so that by turning the ring it may be adjusted to anyposition on the plunger-rod, and it may then be clamped in position bymeans of a screw 37, passing through the split portions, so that byturning the screw the ring may be contracted and clamped in place uponthe plunger-rod. With the pressure device thus arranged the descent ofthe plunger-rod brings the disk 34 into contact with the ring 19 andcompresses the springs as the plunger descends into the mold, so thatthe ring 19 is held down with a spring-pressure. The weight of theplunger and all of the parts attached to and carried by it isconsiderable, and to relieve the machine of the unequal strain put uponit in lifting the plunger and the associated parts carried by it on thereturn or upward stroke I provide a lever 79, which is pivotallysupported by the arm 80, attached to the body of the machine. The innerend of the lever 79 is bifurcated, and the arms of the fork take underthe head or knuckle of the rod 14. The outer end of the lever 79 has asliding weight 81, which can be secured at any desired adjustment on thelever 79 by the set-screw 82. This point of adjustment will be such aswill cause the weight 81 to the plunger and its cry of the table 13.This locking-bar is pressed forward by spring 41 and is operated from abell-crank lever 42, one arm of which is connected with the outer end ofthe locking-bar, while the other arm is provided with a roller on abearing on a cam 43 upon the shaft 2 above the cam 25.

It is desirable to maintain the driving devices I in constant operation,but to arrest the motion of the plunger as desired. For this purpose Iprovide a clutch mechanism or device F between two sections 1 1 of theshaft I, so that the section 1, upon which is the pulley 4, may rotateconstantly, but the movement of the other section 1, which is connectedwith the plunger, may be arrested. Upon the section 1 of the shaft is asleeve 47 having in its outer face a recess 00, into which extends theends of one or more pins 48. The section 1 carries a transverse bolt 49,fitting a transverse recess and pressed outward by a spring 50, aportion of this bolt extending into the recess 50 of the sleeve 47,while another portion y of the bolt is beyond the end of the sleeve; Awing 41 is pivoted at w to the head at and has a circular opening a; ofa size to receive the shaft I and the projecting portion of the bolt 49as the latter is carried around by the section 1 of the shaft, but witha cam-face u, so arranged that when the Wing is thrown in the directionofits arrow, Fig. 4, to the position shown in Fig. 2 and the bolt iscarried within the recess 1; the projecting portion y of the bolt willby contact with the edge u be carried inward, whereby the shoulder ofthe bolt cannot make contact with the pin 48. As a consequence of this,the portion 1 of the shaft will not rotate with the driver portion ofthe shaft so long as the wing 51 occupies a position against or inproximity to the end of the sleeve 47. When, however, the wing 51 iscarried to the position shown in Figs. 1 and 4, the bolt 49 remainsoutward and the pin 48 will be brought in contact with the side of thebolt and both sections of the shaft will turn together. Any suitablemeans may be employed for swinging the wing 51 into position. As shown,the Wing is secured to a transverse shaft w, having an arm 53, to whichis connected the spring 54, that tends to throw the wing inward, andthereby normally prevent the movement of the plunger. The shaft to isprovided with an arm 55, connected by a rod 56 with a treadle 57 nearthe bracket 0, so that the operator by placing his foot upon the treadlemay swing out the wing and cause the two parts of the shaft to turntogether; butwhen his foot is removed from the treadle the operation ofthe plunger at once ceases. With the Wing is also combined means formechanically vibrating it, whereby while the section 1 of the shaft 1rotates continuously the section 1 may be automatically stopped andstarted, so as to arrest the movement of the plunger at the end of itsdownward stroke or at the termination of its stroke in either direction.These results may be effected by different devices. As shown, acam on ashaft 2 vibrates the arm 71 of a rock-shaft 72 and another arm 73 onwhich is connected to vibrate the wing-shaft, as by movable steps 74 75on the rod 56, Fig. 2. By shifting the steps 74 75 the devices foroperating the wing automatically may be thrown out of action.

It is very desirable that the plunger shall restfor a short time afterhaving completed its downward movement in order that the glass may havetime to harden in the mold. This is effected by the means described, asthe contact of the pins 48 49 insures the retation of the section 1*with the section 1 until the Wing is swung forward into place,when thepin 49 is carried back as the plunger reaches its lowest position, andit there remains until the wing swings out away from the sleeve 47 whenthe next pin 48 strikes the pin 49 and carries the shaft-section 1 withthe section 1. The wing 51 meanwhile has again swung in toward thesleeve 47, so that as the pin 49 reaches a vertical position it isdepressed by the face it and the -motion of the plunger is againmomentarily arrested. By placing a second segment in the wing, so as toafford a second bearing-face u, Fig. 5, the plunger may be arrestedmomentarily at both the top and the bottom of its stroke.

It is of course necessary to prevent the plunger from being started inoperation except when the table is in its proper position locked by thelocking-bar 40. To insure this result, I-combine with the means forstarting the table in operation a detent device G of any suitablecharacter that will prevent the operation of the starting devicesexceptwhen the locking-bar 40 is in place locking the table. One form ofdetentis illustrated in Figs. 2 and 3, which show a detent in the formof a bell'crank lever 58, pivoted to a bracket 59, extending from theframe, one arm connected with one arm of the lever 42, while the otherarm 1" has a slot .9, which when the lever is swung in the direction ofits arrow,

Fig. 3, receives the rod 56 below a collar 60.

As a result of this arrangement when the locking-bar 40 is withdrawnfrom the table 13 the arm 1" of the detent will be below the collar 60and the rod 56 cannot be drawn down,and therefore the movement of theplunger cannot be started until the table hasbeen turned to a positionto permit the lockingbar 40 to enter one of the recesses, when the arm1' will swing outward and the clutch F may be engaged to operate theplunger.

As the shaft 2 operates continuously and as it is sometimes desirable toarrest the intermittent motion of the table, I provide means forthrowing the pawl out of engagement with the ratchet 12-as, forinstance, by providing the pawl with wings 62, which may be turned tomake contact with the end of the arm 8, and thus hold the pawlretracted.

While the molded articles may be drawn from the table by means of anysuitable tool carried by the hand of the operator, I prefer to make useof a mechanically-operated discharger. Such device may be of differentforms, and one which is effective is shown in Figs. 7 and 8. In thesethere is a blade 61, carried by an arm 61, pivoted to the frame to swinghorizontally and operated by a cam 62 on the shaft 2, so as to bring theblade 61 beneath the rings 19 and 20 when the latter are elevated anduntil the molded article is discharged and falls on the blade. The camthen swings the arm 61 to carry the blade outward as the rings 19 2Odescend. As the blade again moves inward on another mold being broughtopposite the blade, the article thereon is brought against a stop 63. Asshown, this is a curved finger on the end of an arm 64, pivoted to swingvertically under the action of a grooved cam 65 on the shaft 2, so as todrop behind the article on the blade 61 after the latter has movedoutward.

While I have shown certain devices for imparting movement to the mainparts of the above-described apparatus, it will be evident that thesemay be altered and the gearing and adjustments may be varied withoutdeparting from the main features of my invention and that the characterof the dies or molds may be varied according to the character of thearticles to be formed, which may be caps or other articles of vitreousmaterial.

Without limiting myself to the precise construction and arrangement ofparts shown and described, I claim as my invention-- 1. The combinationin a machine for mold ing glass articles, of a reciprocating plunger, atable beneath the plunger, and means for moving the table with anintermittent motion, a sectional mold carried by the table, a shaftarranged above the table and adapted to engage one section of the mold,and means for elevating the mold to bring it into engagement With thesaid shaft, substantially as set forth.

2. The combination of a table, a means for rotating the same withintermittent motion, a series of molds carried by the table, each moldhaving a section adapted to be lifted from the table, a reciprocatingplunger arranged above the table, and a rotating device also arrangedabove the table and adapted to engage one of the sections of the moldwhen the latter is lifted, substantially as set forth.

3. The combination of a movable table, its

yokes sliding vertically therein and connected with sectional moldsthereon, a rotating device above the table for engaging one section ofeach mold, a lever below the table having an inclined edge for engagingthe yoke and partially lifting it, and means for vibrating the lever tobring the mold-sections into engagement with the rotating device,substantially as set forth.

4. The combination with the movable table, of a series of molds insections, one section rotatable in respect to the other, a rotatingshaft with an engaging device above the table, and meansfor lifting thesectional molds successively into engagement with said device,substantially as set forth.

5. The combination with the movable table,

' of a yoke carrying a mold in sections and movable vertically,ratchet-teeth upon one of the sections of the mold, a shaft above thetable provided with a ratchet, and means for raising the mold-sectionsinto engagement with the same, substantially as set forth.

6. The combination with a table provided with a series of molds eachwith a rotatable section, of aplunger, means for reciprocating the same,a rotating device for engaging the rotatable sections of the molds,means for lifting the mold-sections to bring the rotatable section intoengagement with the rotating device, and a locking device for lockingthe table with the molds in position below the plunger and rotatingdevice, substantially as set forth.

'7. The combination of a circular table, means for rotating the sameintermittently, series of molds, each having vertically movable androtatable sections, a reciprocating plunger, and a rotating shaftarranged above the table, and a device upon the shaft for engaging therotating sections of the molds, substantially as set forth.

8. The combination with the table ofa glassmolding machine, of a yokesliding in said table, a mold-section connected with the table, a secondmold-section connected with the yoke, and a third mold-section carriedby the second and rotatable upon the same, substantially as set forth.

9. The combination of the movable table, a series of sectional moldsmovable vertically and one section rotatable upon the other, areciprocating plunger, and a spring-pressing device carried by theplunger and adapted to engage the upper sections of the molds andmaintain a spring-pressure thereon during the descent of the plunger,substantially as Set forth.

10. The combination with the movable table,reciprocatin g plunger andsectional molds movable vertically and provided with rotatable sections,of a presser device for holding the rotatable sections during the actionof the plunger, substantially as described.

11. The combination with the movable table,reciprocating plunger andsectional molds movable vertically and provided with rotatable sections,of a presser device for holding the rotatable sections during the actionof the plunger, and means foradjusting said presser device verticallyupon the plunger-shaft, substantially as set forth.

12. The combination of the plunger and shaft I in two sections, oneconnected with the driving means and the other with the plunger, and aclutch device and means for intermittently operating the same to stopand start the shaft-section connected with the plunger to arrest thelatter momentarily at both limits of its stroke, substantially as setforth.

18. The combination with the table, molds and plunger, of a shaft in twosections, means for driving one of the sections, a radiallymovable pinupon one of the sections adapted to engage a projection upon the other,a movable wing with a face arranged to engage said pin to carry it outof engagement with such projection, and means for shifting the posi- Ition of the said wing, substantially as set forth.

14. The combination of the movable table,

its series of molds and plunger, a shaft in two sections, connected tooperate the plunger, means for drivln g one of the sections, a clutchdevice between the sections, alocking-bar for locking the table inposition prior to the op- GRANVILLE H. GRAY.

Witnesses:

J OHN B. SHERWOOD, S. MAHLON UNGER.

